Calipers



Dec. '27, 1927.A

. B. B. GARRETT CALIPERS Filed Jan. 22, 1927 y, Za

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Patented Dec. 27, 1927.

fUNfIrfED BERKELEY B. GARRET'T,

i insane iPfATiEN -o'FsFijcea.,

or .RoANokn vmernra.

' CALIPERS.

Application inea January. 22,1927. serial No. 162,843.

' -fAastill` further `object kot. 'the 2 invention vfis to .lprovildeffmeans v'tor securely 'holdingfthe balance :wheel "whileithe same iis being y:bent by the watchmaker, thereby :eliminating vall possibility fot undue str-ain being brought to bear Hon 'the 'pintle :of the fbalance wheel to bend the same, or render the pintle-in operative.

With the foregoing and other objects in view which will appear as the description proceeds,- the'invention resides in the coinbination and arrangement of parts and in the details of construction hereinafter del scribed and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from thespirit of the invention.

Referring to the drawing:

vFigure 1 is a plan view ot a tool con* structed in accordance with the invention.

Figure 2 is an elevational view of one edge ot the tool.

Figure 3 is a sectional view taken on line 3 3 of Figure 1.

Figure 4 'is a sectional View taken on line 4-4 of Figure 1.

Referring to the drawing in detail, the device includes a body portion indicated generally by the reference character 5, the same being formed of sheet metal and pro-v vided with downwardly extended portions 6 deiining supporting legs.

One end of the body portion is cut away defining a ksubstantially large opening 7 and a pair of arms 8 and 9 respectively to which arms the members 10 are secured, the members 10 being tubular information and provided with internal threads to receive the threaded bearing members 11.

These bearing members 11 are formed with kn 'd heads 12, whereby they may towards or away from. each other l tofadjust them for use in supportinga balance wheel, ina manner-as shown by Figure 1, the -balancewhee'lbeing indicatedfby thel reference charactervr 13.

Depressione are termed in the adjacent endsot the bearing members 11 and accommodatethepintle ot-th'e balance wheel, to vthelfe'ndthat when/the vbearing members are moved towards each other, they will'acty to clamp thepintle of the balance wheelv to f properly support the same.

iivotallyfsupported"on the body portion 5 isianarm-llt `which is provided with,l an en-v larged 5portion -15 having an inclined edge 16 to'fbe engaged fby "the Iscrew 17. which passes vthrough fan openingvvtormed in the ear 18. This screw-17 is Aprovided -and acts asfaf-stop for-'the arm 114 to insureagainst t-lie'farinv being `moved too tar when the same l is being moved to its activeipositi'on.

At one end of the wide portion 16 of the arm 14 is alaterally Vextended flange 19 which is provided with an opening to accommodate the threaded end 20 of the adjustable gauge arm 21, which extends along one edge of the arm 14 and is provided with a right angled extremity 22 designed to engage the balance wheel under treatment, to hold the same while it is being trued.

A threaded opening is formed in the body portion and accommodates the screw 23 formed with a winged portion 24 to permit the same to be readily operated. rlhis screw also passes through an elongated `opening 25 formed in the enlarged portion 15 of the arm 111 so that the arm 141- may be adjusted longitudinally ot the body portion 5 to accomplish the purpose of the invention.

A clamping member 26 is formed with downwardly extended iianges at kits ends, which flanges rest against the edges ot the gauge arm and wide portion of the arm 14, p

to a position adjacent to the lower surface of the balance wheel so that the trueness of the truenos when] may be demini-neri, esta: uit

One end of the arm 29 is bittui'cated and accommodates the screw 31 -which may be operated to clamp the arm 29 and hold the arm in various positions ot adjustment.

ln the operation oi' the device, a balance Wheel which has been distorted and which is to be straightened, is positioned in the bean ing members, as clearly shown by Figure 1. The gauge arm and its supporting arm are now -moved to a position whereupon the right angled portion 22 of the gauge arm Will contact With the inner edge of the balance Wheel at the point Where the sameis out of true. y

With the balance Wheel clamped in this position,y the person using the tool may grasp the balance Wheel between the thumb and forefinger and. by a slight pull, bend the balance Wheel to straighten it.

I claim:

l. A tool of the class described compris-v 2. A tool of the class described including a body portion, adjustable means at one end of the body portion for supporting a balf porty the Wheel While being straightened.

3. A. tool ot the class described including a body portion,y means at one end of the body vportion for supporting a balance Wheel, an arm pivotally secured tothe body portion, a gauge arm mounted 'for slidable movement on the first mentioned arm,means at one end of the gauge arm for adjusting the gauge arm with respect to the arm supporting the same, vsaid gauge arm adapted to grip abalanc'e Wheel at its rim to hold the balance Wheel, and means for restricting pivotal movement of the arm.l

In .testimony that I claim the foregoing: as `my own, have hereto affixed my signature. Y

BERKELEY B. GARRETT. 

